package com.rpframework.module.common.bottom.weixin.util;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.URL;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.rpframework.core.json.EmptyException;
import com.rpframework.module.common.bottom.weixin.AccessToken;
import com.rpframework.module.common.bottom.weixin.JsapiTicket;
/**
 * 公众平台通用接口工具类
 * 
 * @author liuyq
 * @date 2013-08-09
 */
public class WeixinUtil {

	/**
	 * 发起https请求并获取结果
	 * 
	 * @param requestUrl 请求地址
	 * @param requestMethod 请求方式（GET、POST）
	 * @param outputStr 提交的数据
	 * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
	 * 
	 */
	
//			//access_token_url获取access_token的接口地址（GET） 限200（次/天）
//			String requestUrl = access_token_url.replace("APPID", appid).replace("APPSECRET", appsecret);
//			//http发送get请求返回JSON格式{"access_token":"ACCESS_TOKEN","expires_in":7200}
//			JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
	public static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {
		JSONObject jsonObject = null;
		StringBuffer buffer = new StringBuffer();
		try {
			// 创建SSLContext对象，并使用我们指定的信任管理器初始化
			TrustManager[] tm = { new MyX509TrustManager() };
			SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
			sslContext.init(null, tm, new java.security.SecureRandom());
			// 从上述SSLContext对象中得到SSLSocketFactory对象
			SSLSocketFactory ssf = sslContext.getSocketFactory();
			//创建URL对象
			URL url = new URL(requestUrl);
			//创建HttpsURLConnection对象，并设置其SSLSocketFactory对象
			//调用 URL对象的openConnection()方法取得与微信的链接
			HttpsURLConnection httpUrlConn = (HttpsURLConnection) url.openConnection();
			httpUrlConn.setSSLSocketFactory(ssf);
			//　这样，HttpsURLConnection对象就可以正常连接HTTPS了，无论其证书是否经权威机构的验证，只要实现了接口X509TrustManager的类MyX509TrustManager信任该证书

			httpUrlConn.setDoOutput(true);
			httpUrlConn.setDoInput(true);
			httpUrlConn.setUseCaches(false);
			// 设置请求方式（GET/POST）
			httpUrlConn.setRequestMethod(requestMethod);
			if ("GET".equalsIgnoreCase(requestMethod))
				httpUrlConn.connect();

			// 当有数据需要提交时
			if (null != outputStr) {
				OutputStream outputStream = httpUrlConn.getOutputStream();
				// 注意编码格式，防止中文乱码
				outputStream.write(outputStr.getBytes("UTF-8"));
				outputStream.close();
			}

			// 将返回的输入流转换成字符串
			// 从request中取得输入流
			InputStream inputStream = httpUrlConn.getInputStream();
			
			InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

			String str = null;
			while ((str = bufferedReader.readLine()) != null) {
				buffer.append(str);
			}
			bufferedReader.close();
			inputStreamReader.close();
			// 释放资源
			inputStream.close();
			inputStream = null;
			httpUrlConn.disconnect();
			//JSON与JAVA数据的转换把json凭证凭证信息转换成JSONObject对象
			//jsonObject = JSONObject.fromObject(buffer.toString());
			jsonObject =  JSON.parseObject(buffer.toString());
		} catch (ConnectException ce) {
			throw new EmptyException("Weixin server connection timed out.",ce);
		} catch (Exception e) {
			throw new EmptyException("https request error:{}", e);
		}
		return jsonObject;
	}
	// 获取access_token的接口地址（GET） 限200（次/天）
	public final static String access_token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";

	/**
	 * 获取access_token
	 * 
	 * @param appid 凭证
	 * @param appsecret 密钥
	 * @return
	 */
	public static AccessToken getAccessToken(String appid, String appsecret) {
		// 获取到的凭证   String token; 凭证有效时间，单位：秒   int expiresIn;
		AccessToken accessToken = null;
		
		//access_token_url获取access_token的接口地址（GET） 限200（次/天）
		//replace() 方法用于在字符串中用一些字符替换另一些字符，或替换一个与正则表达式匹配的子串。
		String requestUrl = access_token_url.replace("APPID", appid).replace("APPSECRET", appsecret);
		//http发送get请求返回JSON格式{"access_token":"ACCESS_TOKEN","expires_in":7200}
		JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
		// 如果请求成功
		if (null != jsonObject) {
				try {
					accessToken = new AccessToken();
					accessToken.setToken(jsonObject.getString("access_token"));
					accessToken.setExpiresIn(jsonObject.getInteger("expires_in"));
				} catch (Exception e) {
					accessToken = null;
					// 获取token失败
					throw new EmptyException("获取token失败 errcode:{} errmsg:{}");
				}
		}
		return accessToken;
	}
	
	// 获取jsapi_ticket的接口地址（GET） jsapi_ticket的有效期为7200秒
	public final static String jsapi_ticket_url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=jsapi";
	
	public static JsapiTicket getJsapiTicket(String accessToken) {
		// 获取到的凭证   String token; 凭证有效时间，单位：秒   int expiresIn;
		JsapiTicket jsapiTicket = null;
		
		//replace() 方法用于在字符串中用一些字符替换另一些字符，或替换一个与正则表达式匹配的子串。
		String requestUrl = jsapi_ticket_url.replace("ACCESS_TOKEN", accessToken);
		JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
		// 如果请求成功
		if (null != jsonObject) {
				try {
					jsapiTicket = new JsapiTicket();
					jsapiTicket.setTicket(jsonObject.getString("ticket"));
					jsapiTicket.setExpiresIn(jsonObject.getInteger("expires_in"));
				} catch (Exception e) {
					jsapiTicket = null;
					// 获取token失败
					throw new EmptyException("获取token失败 errcode:{} errmsg:{}");
				}
		}
		return jsapiTicket;
	}

}